Portal Software's Bhaskar Gorti to be Featured Panelist at the Total Telecom World Telecommunications Congress; Presentations to Focus on IMS Billing Standards and Prepaid/Postpaid Convergence

Portal Software, Inc.'s (Pink Sheets:PRSF):


WHAT: Portal Software, Inc.'s (Pink Sheets:PRSF) Senior Vice
President of Sales, Marketing, and Alliances, Bhaskar Gorti,
is a featured presenter on the "Promise of Triple
Play/Quadruple Play" panel. The panel will address new and
alternative business models; how to make bundled services
work; VOD as the killer app; assessing the best technology
solutions; QOS issues; and global success stories.

WHO: Bhaskar Gorti, senior vice president, worldwide sales,
services, marketing and alliances, Portal Software
Richard Alden, CEO, ONO
Falk von Bornstaedt, vice president, IP Data & Solutions,
Deutsche Telekom ICSS
Nadine Berezak-Lazarus, managing director, bmp TC

WHERE: Total Telecom World Telecommunications Congress, Hotel
President Wilson, Geneva, Switzerland

WHEN: Thursday, April 27, 2006, 2:50 p.m.

Additional information on the conference can be found on the
Total Telecom World Telecommunications Congress website:
http://www.totaltelecomworldcongress.com.

About Portal Software, Inc.

Portal is the premier global provider of billing and RevenueManagement solutions for the communications and media markets. Thecompany delivers the only platform for the end-to-end management ofcustomer revenue across offerings, channels, and geographies. Portal'ssolutions enable companies to dramatically accelerate the launch ofinnovative, profit-rich services while significantly reducing thecosts associated with legacy billing systems. Portal is the RevenueManagement partner of choice to the world's leading service providers,including Vodafone, AOL Time Warner, Deutsche Telekom, Telstra, NTT,China Telecom, Reuters, China Mobile, Telenor Mobil, and FranceTelecom.